Role of proton-coupled electron transfer in the redox interconversion between benzoquinone and hydroquinone.
Role of proton-coupled electron transfer in the redox interconversion between benzoquinone and hydroquinone.
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DOI：
10.1021/ja308700t
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发表时间：
2012-11
影响因子：
15
通讯作者：
Na Song;C. J. Gagliardi;R. Binstead;Ming‐Tian Zhang;H. Thorp;T. Meyer
中科院分区：
文献类型：
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作者：
Na Song;C. J. Gagliardi;R. Binstead;Ming‐Tian Zhang;H. Thorp;T. Meyer
在较宽的pH范围内，添加酸和碱，通过可逆的Os（dmb）（3）（3+/2+）电对进行的苯醌/对苯二酚氧化还原相互转化，揭示了7条不连续的途径。应用分光光度监测与停流混合已被用来探讨PCET的作用。结果表明，磷酸和乙酸分别作为质子供体和质子受体参与了苯醌的协同电子-质子转移还原和对苯二酚的协同氧化反应。
Benzoquinone/hydroquinone redox interconversion by the reversible Os(dmb)(3)(3+/2+) couple over an extended pH range with added acids and bases has revealed the existence of seven discrete pathways. Application of spectrophotometric monitoring with stopped-flow mixing has been used to explore the role of PCET. The results have revealed a role for phosphoric acid and acetate as proton donor and acceptor in the concerted electron-proton transfer reduction of benzoquinone and oxidation of hydroquinone, respectively.